SPH-flow

Development

LHEEA (ECN/CNRS), NEXTFLOW Software

Method

Particle method
Discretization of the Navier-Stokes equations on a kernel interpolation
Lagrangian spatial resolution
Explicit temporal resolution

Free Surface

Nonlinear allowing connections or heavy fragmentation of the free surface

Main features

2D and 3D code
6 degrees of freedom model
MPI parallelisation
Geometry defined by a arbitrary 3D surface mesh
Fluid structure model SPH / SPH
Coupled fluid structure SPH / FEM (Aster ...)
Variable spatial discretization

Application area and validation test cases

Flows with very high dynamic (impact, sloshing, slamming ...)
Flow over complex geometries (flooding ...)
Flow around moving bodies or deformable bodies
Impact of complex geometries
Coupled fluid / structure simulations

Key benefits

Lagrangian method without mesh
No specific procedure for the capture or tracking of free surface
No problems related to mesh treatments or deformations
Simulation of disconnection / re-connection of the interface
Easy description of large deformations of the free surface (jets, breaking waves...)
Simplicity of implementation of the computations
Low dissipation in the wake
Multi bodies with arbitrary relative motions

Explicit method
Low time steps allowing the capture of forces and pressures during impact with a high temporal discretization
Ease of implementation of complex physical models

Applications and Validations